Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 154
in which a portiait ofFranklin is cnt out; onthe other side is placeda white silk Iibbon, c,and the whole is stronglyclamped between two slipsof wood, p. When a dis-charge is passed, the goldis volatilised, its vapourspass through the parts cut out, and reproduce the design in a violet-brown colour…
Electricity · Magnetism
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